Many people wonder how to get onto the radio control helicopters world. They try to look for the cheapest model.
What level of knowledge you should have in order to make radio control helicopters team? This varies but it is imperative to find help. You must have experience in analog and digital circuits, low frequency also need to know about radio and doing some experiment with transmitters and receivers, since these are the most difficult to tune and make it able to be used in a field without interference and noise emitting function to the other teams.
Why building a team if the markets radio control helicopters equipment is top quality? We are many who enjoy the electronics as a hobby and is a magnificent project that is not widely publicized and there is much information about it. Radio controlled model aircraft pioneers made their own radio equipment and models as well as Old Guard there is also intended that through this site is not lost interest in building radio equipment.
System connectivity
After building and connecting, you must check that we never have to output a voltage higher than 4.2V per cell. Then set starting the multi meter to measure current and output shorting is to verify that the current is also limited to the corresponding value. If you put an ammeter on the charger input could check the charge status noting that the charge current decreases as the pack is charging. During the first hour of the maximum load should see 1C, i.e. for the pack of 700 mA / h, we would see the current of 0.7A.
When it comes to radio control helicopters functionality, something to keep in mind is that to charge a battery 3S 12.6V output we need, if we consider that for regulation to work we need to feed the circuit with at least 13.5V. For the field may be necessary to use a booster like those used to power the notebook from the cars 12v.
The top charger is very easy to make and serves to charge these batteries up to 1250mAh regime. You do not need many skills in electronics to get it going well, just need a voltmeter and an ammeter, i.e. with a common tester reaches us.
Voltage regulation of resistance
The resistance often varies. It is good to become familiar with calculations of the current limiting resistor. As we never charge current 1C should never exceed so if the pack is less than 1250mA / h we have to take account of this calculation. The number of 1250mA comes to reason that the LM317 regulates current to the specified value and no more.
This resistance is responsible for regulating the radio control helicopters voltage value for the final stage of the load.
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